Submission to iTunes and feed validation

Hi there, I’m also having trouble with my podcast not appearing in Itunes. My subscribers receive it no problem but I receive the below message in Connect:

Error: we had difficulty reading this feed, connection reset.

Here is my feed: http://www.gunpowderconsulting.co.uk/feed/podcast

Please could someone help?

The page I need help with: [log in to see the link]